Up to 1953 the two bolt cover was used on both 216's and 235's.
It is clear you have a 235, looks like a 1953, but a earlier cover will fit the 1954 and later head.
If it is a 1953 it could be either a full pressure or a splash 235.
The crucial thing I would check (A) the casting date above the starter, and (B)check to see if there is a kidney bean shaped cover held on with three screws on the drivers side of the block
SEE PIC.
